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<![CDATA[
<HTML>
<HEAD>
<TITLE>JavaScript DESTINATION - P162</TITLE>
<SCRIPT LANGUAGE="JavaScript">
<!--
function zoom(mode) {
var x1 = parseFloat(document.forms[0].x_min.value);
var y1 = parseFloat(document.forms[0].y_min.value);
var x2 = parseFloat(document.forms[0].x_max.value);
var y2 = parseFloat(document.forms[0].y_max.value);
if (mode==0) {
document.forms[0].x_min.value = -2.0;
document.forms[0].y_min.value = -2.0;
document.forms[0].x_max.value = -2.0;
document.forms[0].y_max.value = -2.0;
} else if (mode==1) {
document.forms[0].x_max.value = (x1+x2)/2;
document.forms[0].y_min.value = (y1+y2)/2;
} else if (mode==2) {
document.forms[0].x_min.value = (x1+x2)/2;
document.forms[0].y_min.value = (y1+y2)/2;
} else if (mode==3) {
document.forms[0].x_min.value = x1+(x2-x1)/4;
document.forms[0].y_min.value = y1+(y2-y1)/4;
document.forms[0].x_max.value = x1+3*(x2-x1)/4;
document.forms[0].y_max.value = y1+3*(y2-y1)/4;
} else if (mode==4) {
document.forms[0].x_max.value = (x1+x2)/2;
document.forms[0].y_max.value = (y1+y2)/2;
} else if (mode==5) {
document.forms[0].x_min.value = (x1+x2)/2;
document.forms[0].y_max.value = (y1+y2)/2;
}
history.go(0);
}
// -->
</SCRIPT>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<SCRIPT language="JavaScript">
<!--
document.clear();
// -->
</SCRIPT>
<FORM>
X_min:<INPUT type="text" name="x_min" value="-2.0"> X_max:<INPUT type="text" name="x_max" value="1.25"><BR>
Y_min:<INPUT type="text" name="y_min" value="-1.5"> Y_max:<INPUT type="text" name="y_max" value="1.5"><BR>
(stlacte 'reload' potom, ako zmenite hodnoty)<BR>
<BR>
Zvacsenie:<BR>
<INPUT type="button" name = "zoom0" value="Default hodnoty" onClick="zoom(0)">
<INPUT type="button" name = "zoom1" value="Horny lavy" onClick="zoom(1)">
<INPUT type="button" name = "zoom2" value="Horny pravy" onClick="zoom(2)">
<INPUT type="button" name = "zoom3" value="Stred" onClick="zoom(3)">
<INPUT type="button" name = "zoom4" value="Dolny lavy" onClick="zoom(4)">
<INPUT type="button" name = "zoom5" value="Dolny pravy" onClick="zoom(5)">
<HR>Prosim pockaj, kym prepocitam udaje...<BR>
</FORM>
<SCRIPT language="JavaScript">
<!--
if ((document.forms[0].x_min.value!="") &&
(document.forms[0].y_min.value!="") &&
(document.forms[0].x_max.value!="") &&
(document.forms[0].y_max.value!="")) {
var xmin=parseFloat(document.forms[0].x_min.value);
var ymin=parseFloat(document.forms[0].y_min.value);
var xmax=parseFloat(document.forms[0].x_max.value);
var ymax=parseFloat(document.forms[0].y_max.value);
var ant_x=40;
var ant_y=32;
var dx=(xmax-xmin)/ant_x;
var dy=(ymax-ymin)/ant_y;
var iter=0;
var px=0.0;
var py=0.0;
var a=0.0;
var b=0.0;
var old_a=0.0;
var y=0;
for (var y=0; y<ant_y; y++) {
for (var x=0; x<ant_x; x++) {
iter=0;
px=xmin+dx*x;
py=ymax-dy*y;
a=px;
b=py;
while (a*a+b*b<4.0 && iter<64) {
old_a=a;
a=a*a-b*b+px;
b=2*old_a*b+py;
iter++;
}
document.write("<img src=images/mndl"+iter%8+".gif>");
}
document.writeln("<br>");
}
} else {
document.writeln("Prosim vlozte hodnoty!<br>");
}
document.close();
// -->
</SCRIPT>
</BODY>
</HTML>
]]>
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